Stiff springs - more or less grip?
02-19-2009, 03:39 PM
#46
Three Wheelin'
02-19-2009, 04:46 PM
#47
Addict
Rennlist Member
Rennlist Member
+1. For that matter....
what is a grouping?
is stubbling difficult?
where can I get some anti-squat, and
how does one avoid the strong couple?
Pardon my n00bness, but I am new to these terms is stubbling difficult?
where can I get some anti-squat, and
how does one avoid the strong couple?
Dive and squat can have dramatic effects and without much anti - dive/squat designed in the easiest way to counter act that is with stiffer ride springs.
Another large drawback of large bars is that you've now put a strong couple between opposite sides of the car which will have drastic events in one wheel bump.
Another large drawback of large bars is that you've now put a strong couple between opposite sides of the car which will have drastic events in one wheel bump.
02-19-2009, 04:49 PM
#48
Rennlist Member
02-19-2009, 05:05 PM
#50
Rennlist Member
02-19-2009, 05:26 PM
#53
Rennlist Member
02-19-2009, 05:47 PM
#54
Tom,
Yes, it's a six, but only a 2.7L. I used to run 300 in front and 175 rear in my 914 (at Doug's suggestion, by the way), and was always happy with that setup. I went heavier recently because I'm doing some experiments with underbody aero. From all the reading I've done it's important to keep the ride height as constant as reasonably possible when running a diffuser. Instead of going rock solid, I compromised and went somewhat stiffer.
Scott
Yes, it's a six, but only a 2.7L. I used to run 300 in front and 175 rear in my 914 (at Doug's suggestion, by the way), and was always happy with that setup. I went heavier recently because I'm doing some experiments with underbody aero. From all the reading I've done it's important to keep the ride height as constant as reasonably possible when running a diffuser. Instead of going rock solid, I compromised and went somewhat stiffer.
Scott
.Since SCCA won't allow us any rear spoiler in production classes,a defuser in my case would create an imbalance with too much down force in the front and nothing in the rear.
So,good luck with your defuser experiment.
If you race in PCA,perhaps someday we will share the track together.I only do one or two PCA races a year.The rest are dedicated to SCCA.
Regards,
Tom B.
BTW , in what venue do you race the car.?Sounds like a GT4 or 5 car in PCA.
02-19-2009, 05:59 PM
#55
Rennlist Member
02-19-2009, 06:01 PM
#56
Rennlist Member
02-20-2009, 12:58 AM
#57
Rennlist Member
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes
on
0 Posts
On the track With the original stock springs my 87 S4 is constataly banging off the stops violently enough that I am afraid I might damage or even break something in the suspension.
If the suspension is continually bottoming out dosn't that mean the springs are too light? I have purchased a set of 600-400 hypercoils which I intend to install before the season starts. Any body else running those spring rates on a stock 928? How did the stiffer spring affect the handling?
If the suspension is continually bottoming out dosn't that mean the springs are too light? I have purchased a set of 600-400 hypercoils which I intend to install before the season starts. Any body else running those spring rates on a stock 928? How did the stiffer spring affect the handling?
02-20-2009, 01:35 AM
#59
Rennlist Member
Im on the very soft side at 750 and 475. anything less and at a greater weight will be a sloppy mess on the track. If its a street car and used for track use, it will be very nice though. For racing, I think it would be a little too soft.
mk
mk
On the track With the original stock springs my 87 S4 is constataly banging off the stops violently enough that I am afraid I might damage or even break something in the suspension.
If the suspension is continually bottoming out dosn't that mean the springs are too light? I have purchased a set of 600-400 hypercoils which I intend to install before the season starts. Any body else running those spring rates on a stock 928? How did the stiffer spring affect the handling?
If the suspension is continually bottoming out dosn't that mean the springs are too light? I have purchased a set of 600-400 hypercoils which I intend to install before the season starts. Any body else running those spring rates on a stock 928? How did the stiffer spring affect the handling?